Xweighing-scale



UNITED STATES PATENT OFFICE.

JOHN L. MGPHERSON, OF NEW VIENNA, OHIO.

WEIGHINGSCALE.

Specification of Letters Patent No. 13,497, dated August 28, 1855.

To all whom t may concern Be it known that I, JOHN L. MoPHERsoN, of New Vienna, in the county of Clinton and State of Ohio, have invented certain new and useful Improvements in Scales for Veighing Cattle, Locomotives, or other Heavy Bodies; and I do hereby declare the following,` to be a full, clear, and exact dew scription of the same, reference being had to the accompanying drawings, making a part thereof, in which Figure l represents a perspective view of the scale, the platform, and a part of the frame being removed to more clearly show the several parts. Fig, 2 represents a vertical section through the entire scale, and Fig. 3 represents a top view.

Similar letters where they occur denote like parts.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A represents the frame of the scale; B, the platform; to the inner sides of the frame are attached, and firmly secured the iron supporters D, which serve to support the fulcrums a of the main lever shaft H.- These lever shafts have the shape of hollow cylinders or tubes, for the purpose of giving them sufficient strength, with the smallest quantity of metal; the fulcra and lever shafts are cast of one piece. The platform B rests on the supporters E, which bear on the lever shafts by resting on the knife edge points b.

Then the things to be weighed are placed on-the platform of the scale they bear on the edges b, and turn the lever shafts H, on the edges a, as fulcra. The arms K form one solid piece, with the lever shafts H, and are suspended at their ends by links (Z, which hang on knife edge pivots z, the edges of which are on its upper side. The pivots m are of a similar form, and rest with their downward burned edges on a small platform or supporter. These pivots m and 7L are cast onto both ends of the hollow cylinder L, and have a position diametrically opposite to each other, the edge of pivot m serving as a fulcrum on which tube L, and lever M turn. The connecting rod N, is suspended on pivots p, which are cast on the sides of beam O, formed like a hollow cylinder, having its fulcrum at the pivots a; which rest with their edges turned downward on a standard S. The cylindrical formed beam O, is provided with a slot g on its top in which a sliding indicator P can be moved. This sliding indicator is provided with a pointer which moving on a scale on the beam indicates the weight placed on the platform when a cert-ain weight R has been xed to the end of the beam to balance the platform.

To prevent the platform from careening in case of heavy weights being placed on one side of it, the lever shafts H are provided with a ft-h or guard fulcrum O whose edge is turned upward and in this case is pressed upward against the supporter D serving as an acting fulcrum by which no change in the action of the scale can take place.

Having thus fully described the nature of my invention I would state that I am aware that various things have been made tubular or hollow for the purposes of strength, with lightness of metal. This I do not claim.

What I do claim as new and desire to secure by Let-ters Patent is- In combination with the shafts H, the fifth or guard fulcra c, which prevents the platform from careening, should the weight be unequally distributed on said platform without in the least impairing its correct weighing as set forth.

JOI-IN L. MCPHEE-SON.

IVit-nesses:

CHAs. C. BOWERS, N. B. NIXsoN. 

